**Core Concept**
The renal angle, also known as the costovertebral angle, is an important anatomical landmark used in physical examination and clinical diagnosis. It is located at the intersection of the 11th and 12th ribs and the corresponding vertebral bodies, typically T11 and L1.

**Why the Correct Answer is Right**
The renal angle is significant because it overlies the location of the kidneys. The kidneys are bean-shaped organs that filter waste and excess fluids from the blood. The costovertebral angle is used to assess for signs of kidney disease, such as pain or tenderness, which can be indicative of conditions like pyelonephritis or nephrolithiasis. The renal angle is also used to guide the insertion of a needle for percutaneous renal biopsy or drainage.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because the renal angle does not lie between the 9th and 10th ribs. The 9th and 10th ribs are located more superiorly and do not correspond to the location of the kidneys.
* **Option B:** This option is incorrect because the renal angle does not lie between the 13th and 14th ribs. The 13th and 14th ribs are located more inferiorly and do not correspond to the location of the kidneys.
* **Option C:** This option is incorrect because the renal angle does not lie between the 1st and 2nd ribs. The 1st and 2nd ribs are located more superiorly and do not correspond to the location of the kidneys.

**Clinical Pearl / High-Yield Fact**
Remember the "3 Ps" of renal angle examination: pain, percussion tenderness, and palpable mass. A positive renal angle examination can indicate kidney disease, and it is essential to consider these findings in conjunction with other clinical and laboratory data to make an accurate diagnosis.

**Correct Answer: C. The 11th and 12th ribs and the corresponding vertebral bodies, typically T11 and L1.**